A Study to Evaluate the Safety, Tolerability, Preliminary Efficacy, Pharmacodynamics and Immunogenicity of Universal CNK-UT Cells in Patients With Advanced Solid Tumors.

1. Dose Escalation: After enrollment, participants will recieve preconditioning by lymphodepletion or not, and then will be treated with CNK-UT cells with a "3 +3" design to determine the maximum tolerated dose. 3 dose level of CNK-UK cells will be tested: 4.6E6/kg，1.5E7/kg，4.6E7/kg. The participants will first receive a single ascending dose(SAD) mode of administration. During the DLT observation period (21 days), if the participants do not experience DLT, they will receive a multiple ascending dose(MAD) mode of administration. 2. Indications Expansion: It will be carried out after all participants have completed the DLT observation in the Dose Escalation phase. The target population, dosage and frequency of drug administration in the indication expansion stage can be adjusted and determined according to the previous research results.